Lock



FIG. 1 is a first perspective view of a lock showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top perspective view thereof;

FIG. 8 is a bottom perspective view thereof;

FIG. 9 is a perspective view of another state of the lock thereof; and,

FIG. 10 is a perspective view of the using state of the lock thereof.

The broken lines shown in the drawings depict portions of the lock in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for a lock, as shown and described. 